+#define ETHTOOL_DEV_FEATURE_WORDS 1
+
+static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
+{
+ struct ethtool_gfeatures cmd = {
+ .cmd = ETHTOOL_GFEATURES,
+ .size = ETHTOOL_DEV_FEATURE_WORDS,
+ };
+ struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS] = {
+ {
+ .available = dev->hw_features,
+ .requested = dev->wanted_features,
+ .active = dev->features,
+ .never_changed = NETIF_F_NEVER_CHANGE,
+ },
+ };
+ u32 __user *sizeaddr;
+ u32 copy_size;
+
+ sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
+ if (get_user(copy_size, sizeaddr))
+ return -EFAULT;
+
+ if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
+ copy_size = ETHTOOL_DEV_FEATURE_WORDS;
+
+ if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
+ return -EFAULT;
+ useraddr += sizeof(cmd);
+ if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
+ return -EFAULT;
+
+ return 0;
+}
+
+static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
+{
+ struct ethtool_sfeatures cmd;
+ struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
+ int ret = 0;
+
+ if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
+ return -EFAULT;
+ useraddr += sizeof(cmd);
+
+ if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
+ return -EINVAL;
+
+ if (copy_from_user(features, useraddr, sizeof(features)))
+ return -EFAULT;
+
+ if (features[0].valid & ~NETIF_F_ETHTOOL_BITS)
+ return -EINVAL;
+
+ if (features[0].valid & ~dev->hw_features) {
+ features[0].valid &= dev->hw_features;
+ ret |= ETHTOOL_F_UNSUPPORTED;
+ }
+
+ dev->wanted_features &= ~features[0].valid;
+ dev->wanted_features |= features[0].valid & features[0].requested;
+ netdev_update_features(dev);
+
+ if ((dev->wanted_features ^ dev->features) & features[0].valid)
+ ret |= ETHTOOL_F_WISH;
+
+ return ret;
+}
+
+static const char netdev_features_strings[ETHTOOL_DEV_FEATURE_WORDS * 32][ETH_GSTRING_LEN] = {
+ /* NETIF_F_SG */ "tx-scatter-gather",
+ /* NETIF_F_IP_CSUM */ "tx-checksum-ipv4",
+ /* NETIF_F_NO_CSUM */ "tx-checksum-unneeded",
+ /* NETIF_F_HW_CSUM */ "tx-checksum-ip-generic",
+ /* NETIF_F_IPV6_CSUM */ "tx_checksum-ipv6",
+ /* NETIF_F_HIGHDMA */ "highdma",
+ /* NETIF_F_FRAGLIST */ "tx-scatter-gather-fraglist",
+ /* NETIF_F_HW_VLAN_TX */ "tx-vlan-hw-insert",
+
+ /* NETIF_F_HW_VLAN_RX */ "rx-vlan-hw-parse",
+ /* NETIF_F_HW_VLAN_FILTER */ "rx-vlan-filter",
+ /* NETIF_F_VLAN_CHALLENGED */ "vlan-challenged",
+ /* NETIF_F_GSO */ "tx-generic-segmentation",
+ /* NETIF_F_LLTX */ "tx-lockless",
+ /* NETIF_F_NETNS_LOCAL */ "netns-local",
+ /* NETIF_F_GRO */ "rx-gro",
+ /* NETIF_F_LRO */ "rx-lro",
+
+ /* NETIF_F_TSO */ "tx-tcp-segmentation",
+ /* NETIF_F_UFO */ "tx-udp-fragmentation",
+ /* NETIF_F_GSO_ROBUST */ "tx-gso-robust",
+ /* NETIF_F_TSO_ECN */ "tx-tcp-ecn-segmentation",
+ /* NETIF_F_TSO6 */ "tx-tcp6-segmentation",
+ /* NETIF_F_FSO */ "tx-fcoe-segmentation",
+ "",
+ "",
+
+ /* NETIF_F_FCOE_CRC */ "tx-checksum-fcoe-crc",
+ /* NETIF_F_SCTP_CSUM */ "tx-checksum-sctp",
+ /* NETIF_F_FCOE_MTU */ "fcoe-mtu",
+ /* NETIF_F_NTUPLE */ "rx-ntuple-filter",
+ /* NETIF_F_RXHASH */ "rx-hashing",
+ "",
+ "",
+ "",
+};
+